Add a browser test for UtilityProcessHost.

content/shell/utility/shell_content_utility_client.cc

Index: content/shell/utility/shell_content_utility_client.cc
diff --git a/content/shell/utility/shell_content_utility_client.cc b/content/shell/utility/shell_content_utility_client.cc
index a00bf62d54013db71208964b9a0211492947c1af..2af0813d60335c927bfe07e27c779ab400e63843 100644
--- a/content/shell/utility/shell_content_utility_client.cc
+++ b/content/shell/utility/shell_content_utility_client.cc
@@ -5,14 +5,42 @@
 #include "content/shell/utility/shell_content_utility_client.h"
 
 #include <memory>
+#include <utility>
 
 #include "base/bind.h"
+#include "content/public/common/service_registry.h"
 #include "content/public/test/test_mojo_app.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
 
 namespace content {
 
 namespace {
 
+class TestMojoServiceImpl : public mojom::TestMojoService {
+ public:
+  static void Create(mojo::InterfaceRequest<mojom::TestMojoService> request) {
+    new TestMojoServiceImpl(std::move(request));
+  }
+
+  // mojom::TestMojoService implementation:
+  void DoSomething(const DoSomethingCallback& callback) override {
+    callback.Run();
+  }
+
+  void GetRequestorName(const GetRequestorNameCallback& callback) override {
+    NOTREACHED();
+  }
+
+ private:
+  explicit TestMojoServiceImpl(
+      mojo::InterfaceRequest<mojom::TestMojoService> request)
+      : binding_(this, std::move(request)) {}
+
+  mojo::StrongBinding<mojom::TestMojoService> binding_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestMojoServiceImpl);
+};
+
 std::unique_ptr<shell::ShellClient> CreateTestApp(
     const base::Closure& quit_closure) {
   return std::unique_ptr<shell::ShellClient>(new TestMojoApp);
@@ -28,4 +56,9 @@ void ShellContentUtilityClient::RegisterMojoApplications(
   apps->insert(std::make_pair(kTestMojoAppUrl, base::Bind(&CreateTestApp)));
 }
 
+void ShellContentUtilityClient::RegisterMojoServices(
+    ServiceRegistry* registry) {
+  registry->AddService(base::Bind(&TestMojoServiceImpl::Create));
+}
+
 }  // namespace content